Propeller for aeroplanes



Patented Nov. i8, w24.

Unire strates heimat I i Q PROPELLER FOR AEROPLNES.

Application iled January 1.2, 1824. Serial No. 685,857.

To all whom it may concern.'

Be it known that l, HERBERT SiEsHoLTz, a citizen of the United States of America, residing at Allentown, in the county of Lehigh and State of Pennsylvania, have invented certain new and useful improvements in Propellers for Aeroplanes, of which the following is a specification.

My) present invention relates generally to propellers for aeroplanes and has for its primary-object the provisionl of a propeller bv means of which air may be displaced wit sufficient force to serve the functions usually demanded of such devices and with materially less speed than is required by the ordinary construction.

A still further object is the provision of an aeroplane propeller which will accomplish the above without material complication and will be strong, durable and eiective in use.

In the accompanying drawing, which forms a part of t is specification, and illustrates my invention,

Figure 1 is a side view of my improved pro ller, and igure 2 is a front elevation thereof.

Referring now to these figures, my invention proposes an aeroplane propeller, the diametrically opposed wings v10 and 11 of which lare inclined relatively to one another and at an an lle gradually diverging rearwardly fromt e propeller hub 12 to which,

and from which, the said wings extend.

The hub 12 is secured at 13 upon a driven shaft 14 and from this shaft at a point rearwardly of the said hub, bracing arms 15 radiate to the otherwise free ends of the wings 10 and 11 as plainly shown in Figure It is of course to be understood that in so far as the twist and gradually changing surface curvature and shape of the win s 10 and 11 is concerned they will be forme the same as usual and in accordance with the well known rinciple governing such form, the wings di ering from the usual aeroplane propeller wings by virtue of their inclinal .tion upon rearwardl divergent angles with respect to one anot er, the bracing ofthe same at their rear ends by bracing arms extending from the propeller on which the shaft is mounted, and the fact that the wings thusextended and braced form supports for a plurality of small sup lemental wings 16, the latter of which as p ainly shown extend outwardly from the side edges. of the niain wings 10 and 11 at spaced points along 'the latter and are in practice formed or chap@ in accordance with the forni and' shape oi the main wings although on a miniature scale. I' It is valso contemplated that thel supple'- mental wings 16 inclined from the-sides of the main wings will also be utilizfedaede sired for 'supports for other and still smaller supplemental wings inclined and extending from the sides of the supplemental wings 16 in the saine manner that the latter extend from the sides oi the main wings 10 and 11 'and it is still further contemplated that even these smaller supplemental wings will be shaped in accordance with the acce tedform of pro eller blades or wings like t e supplementa wings 16 and the main wings 10 and 11. i

By thus constructing an aeroplane propeller, it may be utilized'with'certain important advantages in o eration including its proper operation and evelopment of the desired air displacement with substantially reduced speed of rotation, thus reducing the required number of revolutions of the engine shaft. y

I claim:

1. An aeroplane propeller havi a hub and a pair of wings inclined at divergenzangles with respect to one another from the said hub, bracing arms connected at their outer ends to the free ends of said wings and attachable at their inner ends Lto a shaft upon which the propeller is mounted, said supplemental wings whereby to au entV their air displacing capacity as descri ed.

2. An aeroplane propeller having a hub and a pair of wings inclined at divergent an. gles with respect to one another from the said hub, bracing arms connected at their outer ends to the ree ends of said wings Iand attachable at their inner ends to a shaft upon which the propeller is mounted, and supplemental wings extending outwardly at divergent angles along the side edges of the main wings and simulating the latter in form whereb to augment the air dis lacing capacity of tiie main win s as descri ed.

3. An aero lane prope ler having a. hub and a pair o wings inclined at divergent angles with res ect to one another from the y outer ends to the free ends of said wings and -attachable at their inner ends to a shaft upon which the 'propeller is mounted, and supplemental Wings divergently inclined from the side edges ofthe main Wings and of reduced size and similar form to the latter, and other and still smaller supplemental wings simulating the form of the rst mentioned sup pleme'ntal wings and extendin in divergent relation from the side edges o the last mentioned supplemental wings.

In testimony whereof I have aiiixed my signature.

- HERBERTSIESHOLTZ. e. 

